Subject: [PATCH 3/5] can: af_can.c use rcu_barrier() on module unload.

From: Jesper Dangaard Brouer <[email-masked]>
Date: Mon, 08 Jun 2009 15:11:38 +0200

This module uses rcu_call() thus it should use rcu_barrier()
on module unload.

Signed-off-by: Jesper Dangaard Brouer <[email-masked]>
---

 net/can/af_can.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/net/can/af_can.c b/net/can/af_can.c
index 10f0528..e733725 100644
--- a/net/can/af_can.c
+++ b/net/can/af_can.c
@@ -903,6 +903,8 @@ static __exit void can_exit(void)
 	}
 	spin_unlock(&can_rcvlists_lock);
 
+	rcu_barrier(); /* Wait for completion of call_rcu()'s */
+
 	kmem_cache_destroy(rcv_cache);
 }